[QUOTE=B@tman;4948425]
http://www.camaro5.com/forums/showthread.php?t=116019
It's the same speaker with the same part number, BA is 2ohm and regular is 4ohm, your speaker might not be hooked up to the factory amp somehow.
I really have no idea though....[/QUOTE
if this the case, your speaker is drawing only 1/2 the power from the amp(4ohm resistance vs 2 ohms), thus sounding like 1/2 the volume.